Publications
of the
MPIfR
Optical & Infrared
Interferometry Group
F. Herwig, D. Schönberner and T.
Blöcker:
On the validity of the core-mass luminosity
relation for TP-AGB stars with efficient dredge-up
Astronomy and Astrophysics 340, L43-L46 (1998)
Abstract.
We investigate the validity of the core mass - luminosity relation
(CMLR),
originally described by Paczynski (1970), for
asymptotic giant branch stars under the presence of third dredge-up
events.
We find, that models with efficient third dredge-up
with less massive cores than those associated with hot bottom
burning (Blöcker & Schönberner 1991)
do not obey the linear CMLR.
Complete evolutionary calculations of thermal pulse stellar
models which consider overshoot according to an exponential
diffusive algorithm show systematically larger third dredge-up for
lower core masses (0.55 Msol < M_H < 0.8 Msol) than any
other existing models. We present and discuss the
luminosity evolution of these models.
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